When you create a virtual environment, a few specific directories (bin, include, and lib) are created in order to store a copy of the Python installation and some shared Python paths are defined. When the virtual environment is activated, whatever you have installed with pip or easy_install will be put in and used by the site packages of the virtual environment, and not the global site packages of your Python installation.

To install the latest Django 2.1.x in your virtual environment, type the following command:

(myproject_env)$ pip3 install "Django~=2.1.0"